When an accident causes Dr. McCoy to go temporarily insane, he escapes to a strange planet. There, the search party discovers a device left by a superior, vanished civilization, a time portal that plays the history of Earth for them - but then Bones jumps through it into the past, causing a change in history important enough to make the Enterprise vanish. Kirk and Spock, who fortunately made a tricorder recording, must attempt to go through to just before McCoy's arrival and stop him from changing history in the United States during the Great Depression, where they have no advanced technology available.
Did You Know?
The title of this episode refers to both the dead city on the time planet and New York itself, where the timeline will either be restored or disrupted. In Harlan Ellison
's original script, Kirk, upon first seeing the city sparkling like a jewel on a high mountaintop, reverently says it looks like "a city on the edge of forever". In Ellison's first treatment for this episode, the city they travelled back in time to was Chicago. See more
When Kirk walks Edith home he tells her about a novel that will be written by someone from another planet, circling the far left star in Orion's Belt constellation which he points to. However, when the shot changes to the sky, it is overcast at dusk and no stars can be seen. See more
Captain, I must have some platinum. A small block would be sufficient, five or six pounds. By passing certain circuits through there to be used as a duo-dynetic field core...
Uh, Mr. Spock, I've brought you some assorted vegetables, baloney and a hard roll for myself, and I've spent the other nine tenths of our combined salaries for the last three days on filling this order for you. Mr. Spock, this bag does not contain platinum, silver or gold, nor is it likely to in the near ...
The closing credits are set against a combination background of stills from that episode and previous episodes. See more
More recent prints omit the shot in which Rodent accidentally vaporizes himself with McCoy's phaser. Instead, the scene ends with him standing in the alley near the collapsed McCoy and looking bewildered. See more
Theme From Star Trek
Written by Alexander Courage See more